What Is Swarm Simulator?

Swarm Simulator is a free incremental (idle) browser game in which you start with a few larvae and a small pile of meat and grow them into a massive swarm of giant bugs. You play it in a web browser rather than installing an app, and the site recommends Chrome or Firefox — it states that Safari is not supported.

How the game works

The core loop is typical of the incremental genre: your swarm produces resources over time, and you spend those resources to expand. The site's own description frames the starting point as "just a few larvae and a small pile of meat," with the long-term goal of "a massive swarm of giant bugs."

Progress is saved automatically in your browser. When you return after being away, the game shows a "Welcome back" message summarizing what your swarm produced while you were gone — for example, the number of a given unit type generated during that period. This offline production is the main reason the game rewards checking in periodically rather than requiring constant attention.

Saving, storage, and common errors

Swarm Simulator stores your game using cookies or local storage in your browser. The site documents two failure modes you may encounter:

• Third-party cookies blocked. If your browser blocks third-party cookies, the game may be unable to save or load. The site's message asks you to confirm that the game's domain has permission to set cookies/local storage. If saving fails, the game displays the data it tried to save, which you can import later through the options screen.
• Corrupted or unreadable save. If a saved game fails to load, the game shows the raw save data and asks you to keep it so you can import it once the bug is fixed, along with an option to report the bug.

In both cases, the practical step is the same: copy and keep the displayed save data before clearing anything in your browser.

Achievements and options

The game includes an achievement system — achievements have labels, short descriptions, and longer explanations, and award points that appear as a running total. There is also an options screen, which is where you import save data and where you can clear extra styling or graphics if you have enabled them.

A note on the April Fools content

The page includes dated joke entries from April 1 and April 2 announcing that the game would be renamed "Kitten Klicker" and would require graphics to play, with a link for players who "hate kittens." The follow-up entry confirms it was an April Fools joke and offers a link to keep the kitten pictures, which can later be removed via the options screen ("Clear all extra styling/graphics"). If you see references to Kitten Klicker elsewhere, this is the origin — it is not a separate game.

Who it's for

Swarm Simulator suits players who enjoy slow-burn progression games that run in a browser tab and continue producing while closed. It is not a graphics-heavy game, and it is not aimed at players who want real-time action. If you use Safari, plan on switching browsers first, and if you use privacy settings that block third-party storage, expect to adjust them or rely on manual save exports.